<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/angular.min.js"></script>
</head>
<body>
<div ng-app="myApp" ng-controller="myCtrl">

    名: <input type="text" ng-model="firstName"><br>
    姓: <input type="text" ng-model="lastName"><br>
    <br>
    姓名: {{firstName + " " + lastName}}

</div>

<script>
    var app = angular.module('myApp', []);
    app.controller('myCtrl', function($scope) {
        $scope.firstName= "John";
        $scope.lastName= "Doe";
    });
</script>
</body>
</html>